C Si 
 1.0000000000000000
     4.3623931970733585   -0.0000000000000000   -0.0000000000000000
     0.0000000000000000    4.3623931970733585   -0.0000000000000000
    -0.0000000000000000    0.0000000000000000    4.3623931970733585
 C   Si 
   4   4
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000 -0.0000000000000000   T   T   T
  0.0000000000000000  2.1811965985366792  2.1811965985366792   T   T   T
  2.1811965985366792 -0.0000000000000000  2.1811965985366792   T   T   T
  2.1811965985366792  2.1811965985366792 -0.0000000000000000   T   T   T
  1.0905982992683396  1.0905982992683394  1.0905982992683394   T   T   T
  3.2717948978050182  3.2717948978050182  1.0905982992683394   T   T   T
  3.2717948978050182  1.0905982992683394  3.2717948978050182   T   T   T
  1.0905982992683396  3.2717948978050182  3.2717948978050182   T   T   T